No, no mystery. I edited. However if you edit within the first few minutes, there's no "last edited" message.That made my day.
How did half of this post appear when I replied, but didn't show up in your post? Maybe something to do with "¯\_(ツ)_/¯". Is that some secret Illuminati mystery so only the enlightened can see the part after the symbol?
edit - I refreshed the page and the hidden message at the bottom of your post appeared. Even stranger now.
It's a bad habit of mine, I post, and then either find an error or think of more stuff and I don't want to spam posts back-to-back.